elasticsearch - Elasticsearch-查找每个特征的最小值和最大值

Question

我有这种格式的数据。

第一数据:

"properties" : [
  {
    "char_id" : 347,
    "char_value_string" : "107",
    "char_value_int" : 107
  },
  {
    "char_id" : 906,
    "char_value_string" : "8",
    "char_value_int" : 8
  },
  {
    "char_id" : 908,
    "char_value_string" : "Question_V1",
    "char_value_int" : null
  }
}

第二个数据:

"properties" : [
  {
    "char_id" : 347,
    "char_value_string" : "110",
    "char_value_int" : 110
  },
  {
    "char_id" : 906,
    "char_value_string" : "18",
    "char_value_int" : 18
  },
  {
    "char_id" : 908,
    "char_value_string" : "Question_V2",
    "char_value_int" : null
  }
}

第三项数据:

"properties" : [
  {
    "char_id" : 347,
    "char_value_string" : "220",
    "char_value_int" : 220
  },
  {
    "char_id" : 906,
    "char_value_string" : "54",
    "char_value_int" : 54
  },
  {
    "char_id" : 908,
    "char_value_string" : "Question_V3",
    "char_value_int" : null
  }
}

我需要使用聚合来找到每个 char_value_int的 char_id的最大值和最小值。我的要求无效:

GET products/_search
{
  "size": 0,
  "aggs": {
    "properties": {
      "nested": {
        "path": "properties"
      },
      "aggs": {
        "char_ids": {
          "terms": {
            "field": "properties.char_id",
            "size": 10000
          },
          "min_char_values_int": {
            "min": {
              "field": "properties.char_value_int"
            }
          },
          "max_char_values_int": {
            "max": {
              "field": "properties.char_value_int"
            }
          }
        }
      }
    }
  }
}

Answer 1

根据您提供的信息，您似乎没有任何嵌套信息，因此不需要嵌套聚合。

聚合中的简单聚合将适合您的情况。

{
  "size": 0,
  "aggs": {
    "char_ids": {
      "terms": {
        "field": "properties.char_id"
      },
      "aggs": {
        "min_char_values_int": {
          "min": {
            "field": "properties.char_value_int"
          }
        },
        "max_char_values_int": {
          "max": {
            "field": "properties.char_value_int"
          }
        }
      }
    }
  }
}

退货

 "aggregations": {
    "char_ids": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": 347,
          "doc_count": 3,
          "min_char_values_int": {
            "value": 8
          },
          "max_char_values_int": {
            "value": 220
          }
        },
        {
          "key": 906,
          "doc_count": 3,
          "min_char_values_int": {
            "value": 8
          },
          "max_char_values_int": {
            "value": 220
          }
        },
        {
          "key": 908,
          "doc_count": 3,
          "min_char_values_int": {
            "value": 8
          },
          "max_char_values_int": {
            "value": 220
          }
        }
      ]
    }
  }